fix: react-doctor → 64/100 (Bugs 122, Perf 286, A11y 613, Maint 436)

- CartContext: lazy initializers replace mount-only useEffect
  hydration; remove 8 no-initialize-state warnings
- Toast/AdminSearchInput: React 19 useContext/use + drop
  forwardRef (3 no-react19-deprecated-apis)
- ProductFormModal: lazy initializers + useSyncExternalStore
  for mount; parent adds key=editingProduct.id
- InstallPrompt: useReducer for prompt state (no-cascading-set-state)
- QRScanModal: ref-based latest-callback pattern replaces
  useEffectEvent deps mistake
- OnboardingFlow: functional setState (rerender-functional-setstate)
- UsersPage/StopsCalendar/FeaturesAndStats: lazy initializers
  (rerender-lazy-state-init)
- FAQClientPage: server-side brand settings fetch via getBrandSettingsPublic
  in layout; remove supabase import
- LandingPageWrapper: href='#' → href='#top' (anchor-is-valid)
- TuxedoVideoHero: replace animate-bounce with ease-out-expo
  (no-inline-bounce-easing)
- ProductTableClient: useCallback for handleDeleted
  (jsx-no-new-function-as-prop)
- excel-parser: pre-compile delimiter regexes (js-hoist-regexp)
- water-log/settings: Promise.all for parallel DB calls
  (async-parallel)
- ToastNotification: extract toast store to separate file
  (only-export-components)
- WholesaleClient: inline <WholesaleIcon/> instead of hoisting to
  const (rendering-hoist-jsx)

src/components/route-trace/StickerPreviewModal.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useState, useEffect } from "react";
+import Image from "next/image";
 import { LotDetail } from "@/actions/route-trace/lots";
 
 // One-color outline icons
@@ -246,9 +247,12 @@ export default function StickerPreviewModal({ lot, onClose }: { lot: LotDetail;
                 {/* QR — bottom right */}
                 <div className="absolute bottom-1.5 right-1.5">
                   {qrDataUrl ? (
-                    <img
+                    <Image
                       src={qrDataUrl}
                       alt="QR"
+                      width={qrPreviewSize}
+                      height={qrPreviewSize}
+                      unoptimized
                       className="rounded border border-stone-300"
                       style={{ width: qrPreviewSize, height: qrPreviewSize }}
                     />